Man in his late thirties with pelvic mass   

Additional images and questions

What is the most likely diagnosis?
Prostatic-type epithelial polyp
prostatic ductal adenocarcinoma
urothelial carcinoma with glandular differentiation
papillary urothelial neoplasm

This lesion is uncommon.

What is the differential diagnosis of greatest concern?
Nephrogenic adenoma
Prostatic ductal adenocarcinoma
Polypoid or papillary cystitis
Cystitis cystica

Which of these should be included in the differential diagnosis of this lesion?
Urothelial carcinoma with glandular differentiation
Papillary urothelial neoplasm
Benign prostatic hyperplasia (BPH)
Nephrogenic adenoma
Polypoid or papillary cystitis
Cystitis cystica
Cystitis glandularis
All of the above